package com.atguigu.eduservice.service.impl;

import com.alibaba.excel.EasyExcel;
import com.atguigu.eduservice.entity.EduSubject;
import com.atguigu.eduservice.entity.excel.SubjectData;
import com.atguigu.eduservice.entity.subject.OneSubject;
import com.atguigu.eduservice.entity.subject.TwoSubject;
import com.atguigu.eduservice.listener.SubjectExcelListener;
import com.atguigu.eduservice.mapper.EduSubjectMapper;
import com.atguigu.eduservice.service.EduSubjectService;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.InputStream;
import java.sql.Wrapper;
import java.util.ArrayList;
import java.util.List;

/**
 * <p>
 * 课程科目 服务实现类
 * </p>
 *
 * @author atguigu
 * @since 2023-03-14
 */
@Service
public class EduSubjectServiceImpl extends ServiceImpl<EduSubjectMapper, EduSubject> implements EduSubjectService {
    //添加课程分类
    @Override
    public void saveSubject(MultipartFile file,EduSubjectService subjectService) {
        try{
            //文件输入流
            InputStream in = file.getInputStream();
            EasyExcel.read(in, SubjectData.class,new SubjectExcelListener(subjectService)).sheet().doRead();
        }catch (Exception e){
              e.printStackTrace();
        }

    }
//    课程分类列表（树形）
    @Override
    public List<OneSubject> getAllOneTwoSubject() {
          //查询所有的一级分类
        QueryWrapper<EduSubject> wrapperOne=new QueryWrapper<>();
        wrapperOne.eq("parent_id","0");
        List<EduSubject> oneSubjectList = baseMapper.selectList(wrapperOne);
//        查询所有的二级分类
        QueryWrapper<EduSubject> wrapperTwo=new QueryWrapper<>();
        wrapperTwo.ne("parent_id","0");
        List<EduSubject> twoSubjectList = baseMapper.selectList(wrapperTwo);
        //创建list集合，用于存储最终封装数据

        List<OneSubject> finalSubjectList=new ArrayList<>();

//        封装一级分类
        //查询出来所有一级分类list集合遍历，得到每个一级分类对象，获取每一个一份类对象值，
        //封装到要求的List集合里面List<OneSubject>finalSubjectList
        for (int i=0;i<oneSubjectList.size();i++){//遍历oneSubjectList集合
            //得到oneSubjectList每个eduSubject对象
            EduSubject eduSubject = oneSubjectList.get(i);
            //把eduSubject面值获取出来，放到onesubject对象里面

            OneSubject oneSubject = new OneSubject();
//            oneSubject.setId(eduSubject.getId());
//            oneSubject.setTitle(eduSubject.getTitle());
            //.copyProperties值复制到对应onesubject对象里面
            BeanUtils.copyProperties(eduSubject,oneSubject);
            //多个onesubject放到finalsubjectlist里面
            finalSubjectList.add(oneSubject);
            //   在一级分类循环遍历查询所有的二级分类
            //  创建list集合封装每个一级分类的二级分类
            List<TwoSubject> twoFinalSubjectList = new ArrayList<>();
            //遍历二级分类list集合
            for (int m=0;m<twoSubjectList.size();m++){
                //获取每个二级分类
                EduSubject tSubject = twoSubjectList.get(m);
                if (tSubject.getParentId().equals(eduSubject.getId())){
                    TwoSubject twoSubject = new TwoSubject();
                    BeanUtils.copyProperties(tSubject,twoSubject);
                    twoFinalSubjectList.add(twoSubject);
                }
            }
             oneSubject.setChildren(twoFinalSubjectList);

        }


        return finalSubjectList;

    }
}
